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8 results on '"Iqbal, Shawaiz"'

1. The comparison of interstitial relative humidity and temperatures of hermetic and polypropylene bag for wheat grain storage under different agro-climatic conditions of rice-wheat ecosystem of Pakistan: Effect on seed quality and protection against insect pests

Author

Rizwan, Muhammad, Atta, Bilal, Ali, Muhammad Yasir, Ashraf, Ijaz, Arshad, Muhammad, Tahir, Muhammad, Rizwan, Misbah, Sabir, Arshed Makhdoom, Shehzadi, Neelum, Khalid, Usama Bin, Iqbal, Shawaiz, Pan, Ming-Zhen, and Liu, Tong-Xian

Published
2022
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3. Manipulating Rice Planting Geometry and Nutrient Levels has an Effect on Brown Planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) Incidence.

Author

Rafiq, Ch. Muhammad, Rizwan, Muhammad, Atta, Bilal, Sabir, Arshed Makhdoom, Rizwan, Misbah, Arshad, Muhammad, Zeeshan, Muhammad, Latif, Hamza, Khalid, Usama Bin, and Iqbal, Shawaiz

Abstract

Rice is best known as a staple food for half of the world's population. Brown planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) is a serious insect pest of rice crops throughout Asia. In case of a severe attack, the whole crop turns brown called 'hopperburn' and farmers face great yield losses. The experiments were performed to evaluate the planting geometry and nutritional effects on N. lugens abundance and yield attributes of the crop using susceptible rice (var. Basmati 515). Results indicated that planting geometries with more space (60 and 90 cm) after 12 lines with a uniform number of plants in each plot had less incidence of N. lugens as compared to narrow spaced (0 and 30 cm) geometries. More number of N. lugens nymphs (80.0-95.0 number/plant) were recorded with less spaced planting geometry as compared to higher spaced planting geometry (27.0-29.5 numbers/plant) during both years. With different planting geometry, no significant difference was recorded in the agronomic parameters except yield and 1000 grain weight. The highest yield was recorded in a plot with 90 cm path followed by 60, 30 and 0cm path, respectively. Towards different doses of nitrogen and phosphorus on N. lugens, the higher dose of nitrogen had a significant effect on N. lugens nymph survival, adult emergence and survival, while the phosphorus induced a non-significant effect. Therefore, in the absence of N. lugens resistant variety, ecological manipulation and nutrients availability could be a better strategy for shortterm N. lugens management in organic rice production. [ABSTRACT FROM AUTHOR]

Published
2022
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8. Impact of nitrogen nutrition and moisture deficits on growth, yield and radiation use efficiency of wheat (Triticum aestivum L.)

Author

Shehzad, Muhammad Asif, Maqsood, Muhammad, Iqbal, Shawaiz, Saleem, Muhammad, ul-Hassan, Mahmood, and Ahmad, Wahid

Subjects
Irrigation, Moisture, Field experiment, chemistry.chemical_element, Straw, Applied Microbiology and Biotechnology, Nitrogen, Arid, Nutrient, chemistry, Agronomy, Wheat, nitrogen nutrition, moisture deficits, radiation use efficiency, yield, Triticum aestivum L, Yield (wine), Genetics, Environmental science, Agronomy and Crop Science, Molecular Biology, Biotechnology
Abstract

Crop production in arid and semi arid areas is restricted by soil deficiencies in moisture and plant nutrients, especially nitrogen. In order to evaluate the impact of nitrogen nutrition and moisture deficits on growth, yield and radiation use efficiency of wheat ( Triticum aestivum L.), a field experiment was conducted at Agronomic Research Area, University of Agriculture Faisalabad, during 2008 to 2009. The study comprised of four nitrogen levels, that is, N 0 = control, N 1 = 60, N 2 = 120 and N 3 = 180 kg N ha -1 and three water deficit levels, that is, I 1 = irrigation at 25 mm potential soil moisture deficit (PSMD), I 2 = irrigation at 50 mm potential soil moisture deficit (PSMD), I 3 = irrigation at 75 mm potential soil moisture deficit (PSMD). Results of the study revealed that maximum grain yield (6.72 t ha -1 ) was obtained in the case of N 3 (180 kg N ha -1 ) when I 2 = irrigation at 50 mm potential soil moisture deficit (I 2 × N 3 ) was applied in contrast to lowest grain yield (2.00 t ha -1 ) in response to I 3 = irrigation at 75 mm potential soil moisture deficit × no nitrogen (control) (I 3 × N 0 ). Highest plant height (86.27 cm), number of spike bearing tillers m -2 (320), grains per spike (49.73), 1000-grain weight (50.55 g), biological yield (15.48 t ha -1 ), straw yield (8.76 t ha -1 ) and harvest index (43.42%) increased with increasing levels of nitrogen. The maximum value of these parameters was also observed in I 2 where irrigation was applied at 50 mm potential soil moisture deficit. The maximum value of RUE for TDM (6.45 g MJ -1 ) was observed in I 2 × N 3 irrigation at 50 mm potential soil moisture deficit and nitrogen (180 kg ha -1 ) treatment combination. Similarly, maximum RUE for grain yield (2.80 g MJ -1 ) was observed for nitrogen (50 mm potential soil moisture deficit and 180 kg N ha -1 ). Keywords: Wheat, nitrogen nutrition, moisture deficits, radiation use efficiency, yield, Triticum aestivum L.

Published
2012
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